Material: The wing nut driver bit tools is made of high quality CR-V steel, sturdy, durable, wear-resistant, withstanding high pressure. Easy to Use: Just pop it into a power screwdriver and get the wing nut/shutters installed without concern about spraining your thumbs by using other hardware tools, saves wears and tears on your fingers. Practical Design: Up to 5x faster than you can by hand, this wing nut driver designed to tighten or loosen wing nuts, bolts, hooks quickly and effectively when installing hurricane shutters/panels or doing other projects, and saves lots of your time and get your job done more faster. Wide Application: It is used for household DIY, auto parts, woodworking, gardening, professional machine maintenance, etc., saving effort and time. A must-have accessory for various household tool boxes. Package Content: The package contains 2 wing nut drivers. Total Length: 65 mm; Inner diameter of the socket 13 mm.